Equalizing-trolley.



' .No. 631,98I. Paton ted Aug. 29, I899.

A. E. snuwu. EOUALIZING TROLLEY. (Application filed m x, 1899.) (No Model.) 3 Sheets-Sheet I.

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No. 63L98l. l atented Aug. 29, I899.

A. E. BROWN.

E'OUALIZING TROLLEY.

(Application filed May 1, 1899.)

(No Model.) 1 3 SheetsSheet 2.

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N0. 63I,98l. Patented Aug. 29, I899. A. E. BROWN.

EQUALIZING TROLLEY.

(Application fil ed May 1, 1899.) (No Model.) 3 Sheets$heet 3 Zm/mic r.

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UNITED STATES ALEXANDER E. BRO\VN, OF CLEVELAND,- OHIO.

EQUALIZING-TROLLEY.

SPECIFICATION forming part of Letters Patent No. 631,981, dated August 29, 1899.

' Application filed May 1,1899. Serial No. 715,084. (No model.)

To aZZ whom, it may concern:

Be it known that I, ALEXANDER E. BROWN, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and useful Equalizing-Trolley, of which the following is a full, clear, and exact description.

My said invention relates to the truck species of trolleys, whose wheels, arranged in pairs, engage a suspended beam-tramway on the opposite sides thereof and thereby effect a support for the trolley and the load that it is to sustain. The prevailing form of trolley of the above character is made up of a rigid frame extending in a single piece beneath an overhead trackway and upwardly on either side thereof. Rigidlyfixed upon the opposite sides of said frame are socalled overhung pins, which project inwardly therefrom and serve as the journal-bearings or axes for-0p? positely-related pairs of trolley-wheels. In-, asmuch as in constructions of this type the axes above referred to are supported at but one end thereof, their diameter and consequent friction surface is necessarily increased, and the rigidity of the trolley-body above alluded to deprives the trolley of any capacity to adjust itselffrom time to time to superficial irregularities in the track or to equalize the changing strains incident thereto between the said supporting-wheels.

It is a main purpose of my present invention to provide a form of overhead trolley that shall have a principle of construction that obviates the undesirable characteristics hereinbefore referred to and at the same time to accomplish certain other improvements in this connection that are hereinafter pointed out.

In the drawings, Figure I is a side view of a section of my said trolleyin position upon the lower angle of a suspended I-beam track. The trolley is represented as carrying a wheel andpulley-tackle suspendedtherefrom. Fig. II is a cross-sectional view of the structure shown in Fig. I through the line as m. Fig. III represents the view that would appear looking downwardly in Fig. II at the arrowpoint a. Fig. IV is a partial vertical sectional View of a form of bearing entering into the construction, and Fig. V is a downward View of the same detail. Fig. VI is an enlarged sectional view of one of my trolleywheels and the parts incident thereto through the vertical diameter of such wheel.

Pointing out now more particularly the various parts going to make up the device in question, A represents in each case side plates or pieces of steel or other suitable material that together constitute the chief framework or body support of my said trolley. The said side plates are each provided near their two upper corners with apertures of suitable dimensions to receive the bearing pieces or parts fand g, hereinafter to be more particularly designated, and extend downwardly, and at the lower point of the same, midway between the aforesaid apertures, they are pierced with holes through which a pin P may be loosely passed to secure them against the interposed clevis or eyebolt M. As appears in Fig. II, the said side plates A are doubled upwardly upon themselves at the under portions 7t- 7.? thereof and given an outward flare or angle with relation to the said portions is 7.3. This outward flare of the portions 70 should be such as to bring the plates A at right angles with the plane of the respective tracks on which the trolley is to travel.

NV IV are the trolley-wheels, which are employed in pairs in line one wheel with the other and are journaled' in each of the said side plates A A in the manner to be now described. The said wheels W W are provided with the pins or axles O, which are forced tightly therethrough and the projecting ends of which at either side of the wheel enter a special bearing-part journ al-box, respectively designated in the drawings byfand g. The bearing-part journal-box g is a counterpart in every respect of the special bearingf, and the design and mode of attachment in place of these hearings are illustrated by Figs. IV and V, wherein Fig. IV is a downward View, and Fig. V is a view in open elevation, of the said bearingsfor g. In Fig. V the special bearing g is shown as provided with the ears 6 6, extending from opposite sides thereof, having the recesses or incuts therein shown at h h. In Fig IV the said bearing g is represented as penetrating the side plate A and as held in its position therein against rotation by the engagement of the rivets rrwith the recesses 71. h. As above stated, a bearing f, in every respect similar to the bearing g,

is provided for the opposite end of the pin or axle O on the other side of the wheel W to which said axle pertains. The said bearing f, however, instead of penetrating and being seated in a part precisely corresponding with the side plate A, penetrates and is seated in arectangular bar or plate B, which extends across each pair of wheels W W and is firmly secured in a plane parallel with the side plate A by being bolted thereto by the bolts t 15 against the intervening block D. By this means the several special bearingsfand g, in connection with the said ears or flange-like extensions e e, are securely held in their respective positions against either lateral movement or rotation within their said seats. In the actual construction of my said device and as a desirable feature thereof I recommend that in order to reduce friction a slightly-projecting end bearing be provided at the ends of the pin or axle 0 within the said special bearings f, or that said ends be reduced in their diameter by beveling or otherwise, as shown in the drawings at f. In a specific form of my device claimed I introduce as a material element therein two raised bearings e e on the ears or flange-like extensions e 6, between said ears and the plate A to which the same pertains, that shall serve as a bearing and by reason of the limited surface involved shall achieve a certain degree of flexibility or play to the said bearings f and 9 upon their bearings on the respective plates A and B, thereby preventing cramping of the hearings on the axles. I give to the separating-block D a horizontal dimension or thickness that slightly exceeds the thickness of the wheels W W through their hubs, and by having the length of the axle 0 just equal to the distance between the farther interior surface of the journal boxes or bearings f and 9 when the latter are in position in the plates or pieces A and B, I insure complete freedom for the wheels IV to revolve upon their axles without contact themselves with any part of the construction. The apertures in the plates A and B in-which the journal boxes or bearingsf g are to be seated are slightly larger than said bearings, so as to permit to the latter a certain degree of movement in their places under varying strains or when the wheels encounter superficial irregularities in the track. The bearings themselves, in the particular form of my invention herein shown in the drawings, are preferably recessed or excavated throughout the lower half of their interior to admit of oil-soaked waste for the purpose of providing a continuous oil-supply.

The above-described construction is to be assembled and fitted for operative use by my mounting the said trolley-wheels in their said bearings fand 9 between the said side plates Aand the bars B in the manner above described and bolting the side plates A to the bars B by the bolts ti and securing the lower portions of said side plates A together against the intervening eyebolt, hangerblock, or clevis Mby the loose pin P and the springcotters s or other suitable means of securing said side plates in the said position. The trolley may now be run into position upon its trackway I from the end thereof, or if more convenient may be applied to said trackway before the component sections of the same are secured together by the pin P. It is evident that by reason of the loose pin P, as well as the special form of mounting and bearings that I adopt for the trolley-wheels W, I attain a sufficient degree of flexibility for my said device to permit it to readily adjust its parts to any irregularities in the track-surface and at once distribute the strains occasioned thereby equally throughout its various parts.

Having thus described my said invention, what I claim, and desire to secure by Letters Patent, is-

1. In an equalizing-trolley adapted to besuspended from and travel upon an I-beam track, the combination,with wheels for the same having fixed axles, of journal-boxes, or bearings for said wheels, provided with means for preventing a longitudinal movement of said axles Within the same, and side pieces or plates in which said journal boxes or bearings are loosely mounted, which said pieces or plates are connected together beneath said wheels by any suitable means, which, at the same time, permits them to move radially about the point of their said connection, substantially as shown and described.

2. In an equalizing-trolley adapted to be suspended from and travel upon an I-beam track, the combination,with wheels forthe same having fixed axles, of journal boxes or bearings for said Wheels provided with means for preventing a longitudinal movement of said axles therein, and with ears or flange-like extensions therefrom having the raised bearings e, e, and side pieces or plates in which said journal boxes or bearings containing said axles are loosely mounted, as described, the said pieces or plates converging toward each other beneath said wheels and being there connected together in any suitable manner to permit the same to move radially about the point of their said connection, substantially as shown and described.

ALEXANDER E. BROWN.

Witnesses:

L. F. GRIswoLD, F. G. TALLMAN. 

